.main {
    width: 1100px;
    margin: 0 auto;
    padding: 20px 0;
    position: relative;
    height: 2000px;
    /* height: 850px; */
}
.main-left {
    width: 28%;
    float: left;
    background-color: #F3F3F3;
    border-radius: 10px;
    padding-bottom: 40px;
}
.main-left>h2 {
    margin: 30px 0 5px 50px;
}
.main-left dt {
    margin: 20px 0 0 50px;
    cursor: pointer;
    display: inline-block;
}
.main-left dd {
    margin: 10px 0 0 65px;
}
.main-right {
    width: 70%;
    float: right;
    background-color: #F3F3F3;
    border-radius: 10px;
}
.main-right>h2 {
    margin: 30px 0 5px 35px;
}
.main-right-big {
    width: 90%;
    margin: 0 auto;
    padding-bottom: 40px;
}
.main-right-big>h4 {
    margin: 20px 0;
}
.main-right-big>h5 {
    margin: 40px;
}
.main-right-big>p {
    line-height: 25px;
}
.main-right-big dt {
    font-weight: bold;
    margin: 20px 0;
}
.main-right-big dd {
    margin-left: 20px;
}
.dt-1 {
    font-weight: bold;
    border-bottom: 4px solid red;
}
.about {
    /* display: none; */
}
.help {
    display: none;
    position: absolute;
    top: 20px;
    right: 0;
}
 

